Racing Valve Spring Kit Kibblewhite 30-3111 For 99-14 Honda TRX400EX TRX400X
| Type | Intake / Exhaust |
| Retainer Material | Titanium |
| Valve Lift | 0.300” |
| Installed Height | 1.375" |
| Seat Pressure | 70# |
| Open Pressure | 157# |
| @ Lift | 0.300" |
| Note | Running cams with over 0.350” lift requires the use of shortened KPMI® Guide, PN 30-3120 |
Honda® TRX 400X 2009-2014
Honda® XR 400 RFVC 1996-2004
Since 1939, KPMI® has taken great pride in our ability to design innovative performance improvements for valvetrains. This innovative ability has never been more apparent than with the development of the high-tech lightweight racing valve spring kits for the incredibly stressed and torturous environment in today's high-revving 4-stroke engines.
The challenge to engineer a valvetrain that would outperform OEM systems, which in some cases included titanium components, was not an easy one. This task would require the concentrated efforts of every member of KPMI®'s design team. It was apparent early on that an OEM-style spring with a bit more pressure was not going to be the complete answer for these engines. Working together as a team enabled KPMI® to evolve with a "unified system" approach. In fact, these innovative high-performance lightweight valve spring kits, would not only outperform factory parts but outlive them as well.
Each KPMI® spring kit is designed for its specific application, taking into account several critical parameters including; cam profiles, harmonics, natural frequency of the springs, valvetrain mass, required pressure, wire stress, fatigue life, and engine rpm, just to name a few!
Today KPMI® proudly offers complete high-performance lightweight valve spring kits for a host of applications.
